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Finding the Fourth Proportional to 712,699.01, 983,524.80 and 390,420.56

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Solution

The fourth proportional to 712,699.01, 983,524.80 and 390,420.56 is: 538,780.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,699.01 : 983,524.80 = 390,420.56 : x
  2. Step 2: Convert to fraction form
    712,699.01/983,524.80 = 390,420.56/x
  3. Step 3: Cross multiply
    712,699.01x = 983,524.80 × 390,420.56
  4. Step 4: Simplify right side
    712,699.01x = 383,988,298,272.26
  5. Step 5: Solve for x
    x = 383,988,298,272.26/712,699.01
  6. Step 6: Final answer
    x = 538,780.46

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.